I've spent three months in this apartment and I was very happy with my choice. The pictures, the description and the reviews are accurate, so you will get what you book. Pat and Michael are great hosts: I always got quick replies, they organised a driver on my arrival day and they gave me some useful advise to settle in well. When there is an issue, they would help instantaneously. On the other hand, you won't see them if you don't ask, so you'll have all the privacy you want in your apartment.
I enjoyed the area in which the flat is located very much. There are many restaurants, supermarktes, bars, street food and other shops. So it's lively in a good way, but not too crowded or touristy. You'll always find a taxi and you can walk to the MRT in 10-15 minutes.
The flat itself is very well equipped, far above average. There's for example a great washing machine/dryer, a big fridge, a microwave, an iron and ironing board, a smart TV and several towels and sheets. Furthermore, the view on the skyline of Bangkok is amazing. Last but not least, the pool in the courtyard between the buildings is a nice place to relax from the big city. It's very quiet there (as it is in the flat) and never too crowded.
All in all, I've seen several flats of friends and colleagues. You can find a cheaper (and still acceptable) flat, but I haven't seen a better one than this. I'd definitely come back!